Federal food regulators raised their alarm for recalled eggs sold from Costco stores over possible salmonella exposure, reclassifying the targeted product to its highest risk level.

The FDA has classified its recall of eggs sold under Costco's Kirkland brand as a Class I recall, a designation reserved for instances of the highest potential health risk — including death.

In November, Costco recalled nearly 260,000 eggs sold under the Kirkland Signature brand in 25 stores nationwide. The eggs landed on shelves in Alabama, North Carolina, Georgia, South Carolina and Tennessee starting Nov. 22, according to the company.